You are correct, and having them cleaned is not very costly, it was less than a hundred dollars, and we had it done about 16 years ago. We have carpeting all through the house, and I once had a cleaning service, the people with stem heat had less dust than the one’s with forced air!
There might be. Have you tried asking people with dust allergies this? machines that clean air for people with allergies are called "air purifiers"or “air cleaners”.Not surehow effectivethey are, though.
Perhaps this was mentioned but, Vacuum after you dust so that your vacuum sucks up at least some of what you’ve launched into the air by dusting. Also, since most people use bagless vacuums these days, make sure to clean ALL the machine’s cleanable filters each time you use the machine and look to the manufacturers recommendations as to when any other filters should be replaced. My machine has two washable foam filters and a HEPA filter. If I forget to clean the foam filters after use, I clean them before and dry them by smooshing them onto paper towels and then blow drying them.
Also double check that your vacuum is not spewing dust back out. I had one like this, check for dusty accumulations on the cleaner, it will be in areas where the leak is occurring.
I have used one of these in the past. I still have it in the garage, which may say something about how effective I found it.
While it did pick up a lot of junk out of the air (based on what I saw when I cleaned it every week), I saw no noticeable difference in dust accumulation. I think it made a small difference in terms of allergies but the fact that I don’t bother using it says everything.